Surgery – Truss – Pad
Patent
1991-09-13
1992-12-29
Kamm, William E.
Surgery
Truss
Pad
128772, A61B 812
Patent
active
051742950
ABSTRACT:
System for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces a substantially inform beam which encompasses the vessel. The transducer receives ultrasonic energy back scattered from the red blood cells and provides an electrical output signal. A first moment detector is provided which receives the electrical output from the transducer and provides a first moment signal. Normalization is provided to the output of the first moment detector to provide an electrical output representing a characteristic of the flow of the liquid in the vessel.
REFERENCES:
patent: 4532933 (1985-08-01), Hokanson
patent: 4771788 (1988-09-01), Millar
patent: 4951677 (1990-08-01), Crowley et al.
patent: 4991588 (1991-02-01), Pflueger et al.
Christian Jeffrey J.
Corl Paul D.
Haase Wayne C.
Segal Jerome
Williams Ronald G.
Cardiometrics Inc.
Kamm William E.
Manuel George
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